Description

The current event logging is basically only good to count the number of times event X happens per day, which is not so useful for informing UX questions. To improve it, we should link events that happen on the same page: when MediaViewer first loads, generate a random flow id, and use that to identify the events on the same page. This will help us answer questions like "how often is prev/next used on the same page" or "do people typically use prev/next or close/reopen to navigate between images".